London, Michael Joseph, 1958. First Edition. First Impression. Hardback. A very good copy. Uncommon. Second in Asimov's famous Robot Series (after Caves of Steel and before Robots of Dawn). First UK hardback edition (preceded by US HB and UK magazine issue). A nice copy. Spine a touch toned, small chip to top of spine, some offsetting to endpapers Cover art by Kenneth Farnhill [8396, Hyraxia Books].